import com.mysql.jdbc.jdbc2.optional.MysqlDataSource;
import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

public class TestJDBCDelete {
    public static void main(String[] args) throws SQLException {

        DataSource dataSource = new MysqlDataSource();
        ((MysqlDataSource) dataSource).setURL("jdbc:mysql://127.0.0.1:3306/database1?characterEncoding=utf8&useSSL=false");
        ((MysqlDataSource) dataSource).setUser("root");
        ((MysqlDataSource) dataSource).setPassword("root");

        Connection connection = dataSource.getConnection();

        String sql = "delete from student where id=4";
        PreparedStatement statement = connection.prepareStatement(sql);
        statement.executeUpdate();

        statement.close();
        connection.close();

    }
}
